AMBC-M busbar chamber system is designed to provide either compact&comma; wall-mounting installations or by using optional pedestal sets easily assembled switchboards&period; Every facility is provided to enable it to be mounted easily and economically to busbar chambers which can be applied either to a suitable load-bearing vertical surface&semi; Or by means of a pedestal set&comma; affixed to a vertical surface which need not be load-bearing&period; These are produced in 100&comma; 200&comma; 400&comma; 630 and 800 Amp&period;